A hollow metallic tube a length L and closed at one end produces resonance with a tuning fork of frequency n. The entire tube is then heated carefully. So that at equilibrium temperature its length changes by l. If the change in velocity V of sound is v, the resonance will now be produced by tuning fork whose frequencyis :

A hollow metallic tube a length L and closed at one end produces reson

1.	A hollow metallic tube a length L and closed at one end produces resonance with a tuning fork of frequency n. The entire tube is then heated carefully. So that at equilibrium temperature its length changes by l. If the change in velocity V of sound is v, the resonance will now be produced by tuning fork whose frequencyis :
Answer» `(V-v)/(4(L+l))` `(V+v)/(4(L-l))` `(V-v)/(4(L-l))` `(V+v)/(4(L+l))`. ANSWER :D

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